html,body{background: #f5f5f5;}
.clearfix{zoom:1}.clearfix:after{clear:both;display:block;visibility:hidden;overflow:hidden;height:0;content:'\20'}
.app-main{width:1180px;margin: 0px auto;}
.pr{position: relative;}
.pa{position: absolute;}
.fl{float:left}
.fr{float:right}
